when playing an online multi-player first person shooting game like Halo 3, the "shit goose" player often looks around the map frantically as if he/she is about to pull off the most amazing kill ever seen. The "shit goose" is often seen being a try hard, and usually failing at anything admirable. Then is called a no-life BK, or bad kid,or randy,or garbage BR, or random loser, or randy johnson.

Player 1 "oh my god, look at that BAD KID over there, being a total SHIT GOOSE"
Player 2 "oh yeah, thats just 481. He's always shit goosin' it"
Player 1 "WoOoOOoOoOW!!! what a try hard SHIT GOOSE"
Player 2 "Yeah, thats 481 for ya, SHIT GOOSE champion of the world"

Shit Goose (n) - One who comes to a party without liquor, or anything else to share with the population at large. Also notorious for drinking too much and getting sick in all the wrong places (your parent's bedroom).

Someone who thinks they're a gangster from New York who can't cook, has hippie parents, wishes he was black, has an imperfect chest, rope-like hair, dresses like a shmo, and who counts jerking off as getting laid.

R.J. Brown is the biggest shit goose ever! Wait, isn't his name goose shit? That's the way the ladies known him.